ppc/pnv: Change powernv default to powernv10

POWER10 is the latest IBM Power machine. Although it is not offered in
"OPAL mode" (i.e., powernv configuration), so there is a case that it
should remain at powernv9, most of the development work is going into
powernv10 at the moment.

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

Author: npiggin

hw/ppc/pnv.c

@@ -2242,8 +2242,6 @@ static void pnv_machine_power9_class_init(ObjectClass *oc, void *data)
 
     xfc->match_nvt = pnv_match_nvt;
 
-    mc->alias = "powernv";
-
     pmc->compat = compat;
     pmc->compat_size = sizeof(compat);
     pmc->dt_power_mgt = pnv_dt_power_mgt;
@@ -2267,6 +2265,8 @@ static void pnv_machine_power10_class_init(ObjectClass *oc, void *data)
     mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("power10_v2.0");
     compat_props_add(mc->compat_props, phb_compat, G_N_ELEMENTS(phb_compat));
 
+    mc->alias = "powernv";
+
     pmc->compat = compat;
     pmc->compat_size = sizeof(compat);
     pmc->dt_power_mgt = pnv_dt_power_mgt;